F79
Unspecified intellectual disabilities
Risk-adjusting (HCC)Billable code
HCC risk adjustment mapping
RxHCC V08
RXHCC148
Mild or Unspecified Intellectual Disability/Developmental Disorder
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · F79
Synonyms
Mental deficiency NOS Mental subnormality NOS
Inherited from F70-F79Intellectual Disabilities
Excludes 1
borderline intellectual functioning, IQ above 70 to 84 (R41.83)
Code first
any associated physical or developmental disorders
Inherited from chapter 5Mental, Behavioral and Neurodevelopmental disorders
Includes
disorders of psychological development
Excludes 2
symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Official Guidelines for F79
FY 2026 ›Find F79 in the alphabetic index
2 index paths lead to this code